Double jack for telegraph-circuits.



No- 806,812. PATENTED DEC. 12, 1905. 0. JOHNSON.

DOUBLE JACK FOR TELEGRAPH CIRCUITS.

APPLIOATION FILED MAR.16, 1905.

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A TTORIVEYS No. 806.812. PATENTED DEC. 12, 1905.

0. JOHNSON.

DOUBLE JACK FOR TELEGRAPH CIRCUITS. APPLICATION rum) Mums} 1905.

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DOUBLE JACK FOR TELEGRAPH-CIRCUITS.

Specification oi Letters Patent.

Patented Dec. 12, 1905.

Application filed March 16, 1905.. Serial Np. 250,402.

T all whom, it may concern.-

Be it known that I, OLA J OHNSON, a citizen of the United States, and a resident of Conway Springs, in the county of Sumner and State of Kansas, have invented a new and Improved Double Jack for Telegraph-Circuits, of which the following is a full, clear, and exact description.

My invention relates to telegraphy and kindred arts, my more particular object being to provide for shifting a plurality of circuits or parts of circuits, so as to throw one set of instruments out of commission and another set into commission. To this end I have so arranged the instruments and wiring that a telegraph operator is enabled by merely inserting a plug in a jack to shift parts of both the located in a different part of the room or upon a different table. For instance, an operator may use a particular key and sounder for ordinary railway-telegrams, but may desire to occasionally use another key and sounder for purposes of handling press-despatches, in which event the sounder last mentioned may be mounted within a resonator.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures. 4

Figure 1 is a diagram of the wiring and electrical connections for all of the instruments. Fig. 2 is a side elevation of the double jack, the plug of which is indicated as removed. Fig. 3 is a side elevation of the jack, showing the plug in position. Fig. 4 is a plan view of the jack with the plug removed, and Fig. 5is an inverted plan view showing the bottom side of the plug.

The base of the jack is shown at 6 and is secured in position by means of screws 7, which pass through ears 8 for the purpose. Mounted upon the base 6 are contact springs 9 10, adapted to engage stationary contact members 'ing-tubes'37 38 in the usual manner.

11 12. Under the spring and out of contact therewith is an auxiliary contact member .13. The contact members 11, 12, and 13 are and immediately below the contact members 26 27 are other contact members 31 30, as will be understood from Figs. 3 and 4. The contact members 31 are connected, respectively, with binding-posts 32 33 by means of screws 32- 33, as will be understood from Figs. 3, 4, and 5. A blind binding-post 34 is mounted upon the plug 24 at a point adjacent to the handle 25. Line-wires are shown at 35 36 and enter the oflice through insulat- (Jonnected with the wire 35 and forming virtually a continuation thereof is a wire 39, which leads to a key 40 and is provided with a circuit-closer 41. From this key a wire 42 leads to the binding-post 20 upon the jack. A wire 43 is connected with the binding-post 14 of the jack and is also connected with the relay 44, so as to energize the same by sending a so-called main, circuit therethrough. A wire 45 is in communication with the line 36 for the purpose of completing the main circuit through the relay. The relay 44 is provided with a contact member 46, whichis engaged by a contact-armature 47 in the manner well understood in the art. From the contact member 46 a wire 48 leads to a sounder 49, and from this sounder a wire 50 leads to the binding-post 15 of the jack. An auxiliary wire 51 is connected directly with the wire 48 and leads from it to the binding-post 16 of the jack.

All of the apparatus thus far described may be considered as mounted upon one table or in one corner of the room. In another corner of the room or upon another table are a plurality of keys 52 53, provided with circuitclosers 54 55 of the usual construction. key 52 is connected by wires 56 57 with the The respective binding-posts 28 and 34. The key 53 is similarly connected by wires 58 and 59 with the respective binding-posts 34 and 32, as will be understood from the diagram. Wires 61 respectively connect the binding-posts 33 and 29 with the sounder 62, which is preferably mounted within a resonator 63, the latter having a support 64 for maintaining the sounder in a comparatively elevated position.

My invention isiused as follows: If the operator desires to use merely the key 40,sounder 49, and relay 44, he withdraws the jack-plug, whereupon the contact-springs 9 10 of the jack descend and :by their resilience engage the contact members 11 12. The circuits may now be traced as follows: main line 35, wire 39, key 40, circuit-closer 41, (the key being normally closed for the purpose of receiving,) wire 42, binding-post 20, wire 22, spring-contact 9, stationary contact 11, wire 17 binding-post 14, wire 43, relay 44, wire 45, and line-wire 36. This energizes the relay 44 and actuates the contact-armature 47, causing the same to engage the contact member ,46. The circuit used in sending by means of the key 40.is identical with that above described, except that the circuit-closer 41 being open the current goes through the body of the key 40 instead of through the circuit-closer, as is usual. The local circuit closed by movements of the contact-armature 47 is as follows: local battery 65, wire 67 contact-armature 47, contact member 46, wire 48, sounder 49,-wire 50, binding-post 15, wire 18, stationary contact 12, spring-contact 10, wire 23, bindingpost 21, and wire 66 back to the battery 65. This circuit of course energizes the sounder 49 in the ordinary way. Both circuits just described are commonly used in the majority of telegraph offices in this country. Suppose now that the operator desires to shift the circuits to the other tables or to the other part of the room, as above suggested. He may desire to do this, for instance, if he uses a type-writer and has difliculty in listening to the clicking of the sounder, and upon that account prefers to bring into requistion the resonator 63. He then inserts the jack-plug as above described, the main circuit being now traced as follows: line-wire 35, wire 39, circuit-closer 41, wire 42, binding-post 20 of jack, wire 22, spring-contact 9, contact 26 of plug, binding-post 28, wire 56, key 52, (or circuit-closer 54,) wire 57, binding-post 34, wire 58, key 53, (or circuit-closer 55,) wire 59, binding-post 32, contact member 31 of plug, stationary contact 11 of jack, wire 17, binding-post 14, wire 43, relay 44, and wire 45 to line-wire 36. This energizes the relay 44,thereby completing the following local circuit: battery 65, wire 67, contact-armature 47, contact 46, wire 48, wire 51, (sounder 49 being now out out,) contact-screw 16, wire 19, auxiliary contact 13, contact member 30 of plug, binding-post 33, wire 60, resonatorsounder 62, wire 61, binding-post 29, contact member 27 of plug, spring-contact member 10, and wire 66 back to battery 65. It will thus be seen that both keys 52 and 53 are in the main circuit, which coacts with the resonator-sounder 62, and that these keys can only beused when the plug is inserted. It will also be noted that the resonator-sounder 62 coacts with either or both of the keys and that when the resonator-sounder is in use the sounder 49 is cut out. It is obvious that the resonator-sounder 62 is out of commission when the plug is withdrawn from the jack, for the reason that there is a total severance of two circuits, of which the local circuit leading to the reson ator-sounder is one. It necessarily follows that when either of the sounders is in use the other is totally silenced.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination of a relay, a main-line circuit for energizing the same, a local circuit connected with said relay and controllable thereby, a sounder connected with said local circuit and normally adapted to be energized thereby, an auxiliary wire connected with said local circuit for cuttingout said sounder, a jack connected with said local circuit and also connected with said auxiliary wire, and a second sounder connected with said jack and adapted to be cut into circuit by aid of said wire for cutting out said first mentioned sounder.

2. The combination of a relay, a main circuit connected therewith for .energizing the same, a plurality of local circuits connected by means of said relay, a double jack connected with both said main circuit and said local circuits, a key and a sounder connected with said jack, and main wiring constituting virtually a continuation of the main line, said local wiring containing an extra sounder to be actuated in lieu of said firstmentioned sounder.

3. The combination of a relay, a main circuit connected therewith for energizing the same, a local circuit connected with said relay, a double jack connected with both said main circuit and said local circuit, a key and a sounder connected with said jack, and main and local wiringconnected with said jack, said local wiring containing an extra sounder to be energized in lieu of said first mentioned sounder.

4. The combination of a main circuit, a relay connected therewith and energized thereby, a local circuit connected with said relay, an auxiliary wire connected with said local circuit and adapted to cut out said sounder,

another sounder adapted to be cut into said to this specification in the presence of two sublocal circuit by aaid of Islaid acllixliliary Wire, 2mg scribing Witnesses. v a jack connecte wit sai astmentione sounder for cutting the same into circuit and OLA JOHNbON' cutting said first-mentioned sounder out of Witnesses: circuit at will. S. L. MONNET,

In testimony WhereofIhave signed my name W. A. THEW. 

